<style scoped>

    .pure-button-xsmall {
        font-size: 100%;
        background-color: #0078e7;
        color: #fff
    }

    .pure-button-small {
        font-size: 150%;
        background-color: #0078e7;
        color: #fff
    }

    .pure-button-large {
        font-size: 200%;
        background-color: #0078e7;
        color: #fff
    }

    .pure-button-xlarge {
        font-size: 250%;
        background-color: #0078e7;
        color: #fff
    }

    .pure-center{
        text-align:center
    }

</style>